Elbow-machine.



P. F. FLAGGE. ELBOW MACHINE- APPLICATION FILED JUNE 22, I9.

Patented Nov. 30, 1915.

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P, F- FLAGGE.

ELBOW MACHINE. APPLICATION FILED mu: 22, 1914.

Patented Nov. 30, 1915.

6 SHEETS-SHEET 2.

P. F. FLAGGE.

ELBOW MACHINE.

APPLICATION man JUNE 22, 1914.

Patented Nov. 30, 1915.

6 SHEETS-SHEET 3.

Inventor.

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P. F. FLA-GGE.

ELBOW MACHINE.

APPLICATION r1110 JUNE 22. 1914.

Patented Nov. 30, 1915.

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ELBOW MACHINE.

APPLICATION mip JUNE 22. 1914.

- Patented Nov. 30, 1915.

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E S t PHILLIP? r. FLAGGE, or MILWAUKEE, WISCONSIN, ASSIGNOR T0 MILWAUKEE comm- GATING COMPANY, OF'GREENFIEID, WISCONSIN, A CORPORATION OF WISCONSIN.

ELBOW-MACHINE.

Specification of Letters Patent. P t ted; Nov. 30, 1915.

Application filedJ'une 22, 1914. Serial No. 846,448.

To all whom it may concern:

Be it known that I, PHILLIPP F. FLAGGE, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Elbow- Machines, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

This invention relates to machines for making longitudinally corrugated and transversely crimped elbows from straight sheetmetal pipe sections. Its main objects are to facilitate the manufacture, reduce the cost and improve the construction of such elbows; to make the operation of machines for this purpose more nearly automatic and thus avoid the necessity of expert operatives or the exercise of particular care and close attention; to provide simple means of adjustment whereby elbows of different lengths and angles may be made on the same machine and the machine may be made to operate successfully on sheet metal of different thicknesses and properties; and generally to acters designate the same parts in the several Figure 1 is a side elevation and vertical longitudinal section on the line 11, Fig. 2, of an elbow machine embodying the invention; Fig. 2 is a plan View of the machine; Fig. 3 is-a longitudinal section on the line 3--3, Fig. 2, of a portion of the machine on an enlarged scale; Fig. 4 is a similar section showing the corrugating and crimping dies in different positions; Fig. 5 is a front elevation, parts being broken away and shown in vertical cross section, of the swinging die head as viewed from the left relative to Fig. 3; Fig.6 is a vertical cross section on the line 66, Fig. 3, showing the stationary die head; Figs; 7, 8, 9 and 10 are vertical cross sections on the lines 7-7, 88, 9-9 and 1010 respectively, Fig; 1; and Fig. 11 is an enlarged inverted section on the line 11 11, Fig.'l.

Referring more particularly to Figs. 1, 2-

and 3, 1 designates a tubular pipe-supportmg horn fastened at its-rear end in and supported by a cross member 2 of the machlne frame. It is formed or provided on the upper side with a longitudinal ratchet 3, and at its front end with a detachable longitudinally corrugated hollow die 4. A tubuf lar shaft 5, journaled in bearings in cross members 2 and 6 of the frame, is provided w1th cams 7 8, 9 and 1.0. A driving shaft 11, mounted in the frame below and parallel with the shaft 5, has a pinion 12 meshing with gear teeth on the cam 10. At its rear end the shaft 11 is provided with a loose driving pulley or wheel 13 and a fixed clutch head 14, having a pin or dog 15, adapted by engagement with openings in the adjoining end of the driving wheel hub to operatively connect the shaft 11 with said wheel. A spring 16 tends to hold the pin or dog 15 in engagement with the driving wheel. The shaft 11 is provided with a constantly applied brake or drag 17, to overcome its m0- mentum and instantly stop and hold it motionless when the clutch is disengaged.

At the front end of the machine an annular die head 18, fastened to the frame of the machine, surrounds the die 4 and is provided as shown in Figs. 3 and 6, with radially movable corrugating and crimping dies 19 and with a die operating ring 20 having pins and rollers 21 projecting from one side thereof into oblique slots 22 in the shanks of said dies, which are held and guided in radial grooves or channels formed in the head. A similar annular die head 23, provided on the sides with trunnions 24, is horizontally hinged or pivoted thereby to the front side of the head 18 in line with the upper side and front end of the die 4, as appears in Fig. 3. :The oscillatory or swinging head 23, like the stationary head 18, is provided, as shown in Figs. 3 and 5, with radially .movable dies 25 and with a die operating ring 26, having pins and rollers 27 projecting laterally therefrom into oblique slots 28, in the shanks of the dies, whichare held and guided in radial grooves or ways in the head. The ring 26 is formed on its inner side, as shown in Fig. 5, with cam faces engaging shoulders on the dies 25, thereby ,relieving the pins and rollers 27 of excessive strain when the dies are forced inwardly.

alinement with the hinge or pivot connections of the head 23 with the head 18, by

'means of a curved finger 30, fastened to the die 29 and fitting in a curved hole in the die 4, as shown in Figs. 3 and 4. The die 29, which is internally recessed and formed with a central opening through it, has downwardly converging ends, being thicker" on the upper. side than on the under side.

The rings 20 and 26 areturned or oscillated in the heads'18 and 23, and the dies 19 and 25 are forced inwardly againstor toward the dies 4 and 29 and withdrawn therefrom outwardly by a rocker shaft 31 below and parallel with the horn 1 and cam shaft 5, as shown in Figs. 1 and 3. At its rear end the shaft 31 is provided as shown in Figs. 1, 2 and 9, with an arm 32, which is connected by a link 33 with ,a lever 34. The lever 34 has a pin and roller projecting from one side thereof into the groove in cam 9 and is fulcrumed to a vertically adjustable block or bracket 36 for varying. the movement of the dies 19 and 25 accordlng to variations in the thickness and pro erties of the sheet metal of which the el ows are made. As shown in Fig. 9, the bracket36 is adjusted vertically by a screw 37 swiveled therein and threaded in oneside of the frame.- It is secured and held in adjusted position by bolts 38 threaded therein and vertical slots in the frame. 7 The cam 9 is made to move the dies 19 and 25 in and out twice to every revolution of the cam shaft 5. At its front end the shaft 31 is provided, as shown in Figs. 1, 3, 5 and passing through 6, with a segment gear or forked arm 39,

which engages teeth or projections 40 and 41 on the rings'20 and 26, the teeth or engagingend of said gear or arm being elongated in the direction of the shaft 31 tomaintain engagement with the tooth or-projection 41 on the ring 26 in different posi-. tions of the head 23.

Radially and longitudinally movable crimpliftersor; bulging dies 42, are fitted in the stationary die 4, as shown in Figs. 3, 4 and 6. These crimp lifters or bulging dies,

which extend part way around the die 4,

gradually diminish in width from the under toward the upper side of said die. On the inner. sides of their front ends they are formed with double projections 43, and have rearwardly extend mg shanks terminating in inwardly project- I ingr lugs 44.

he lugs-44 pro ect into and are loosely confined'in an annular groove45 of a, reciprocating plunger 46, fitted in the die 4. The plunger 46 is attached to the front end of a tubular rod 47 passing rearwardly through inclined or V-shaped ward by the action the horn-1 and shaft 5. At its rear end the rod 47 is connected with a forked lever 48, whichis fulcrumed on the frame, as shown in Figs. 1, 2 and 10. At its outer end the lever 48 is provided with an adjustable bearing block'49, connected therewith by an adjusting screw 50 and a clamping bolt 51,

and engaging with a longitudinally movable slide 52, which is guided on the frame and provided with a roller 53 in the path ofa pro ection 54 on the cam 10. The cam pro dies 42 forward into operative position, as shown in Fig. 3, when the dies 4 and 29 are separated. The dies 42 with the plunger 46' are withdrawn by a projection 55 on the cam 10, working with a roller 56 on a longitudinally movable slide 57, which is connected with the inner end of the lever 48 or with the rear end of the rod 47, as shown in Fig. 1, and as indicated by dotted lines in Fig. 10.

. The swinging or oscillating die 29 is shifted with the head 23 toward and from the stationary die4, by a rod 58 passing loosely jection 54 with the slide 52 and lever 48, operates to shift the plunger 46 with the adjusted to engage with said bracket and receive the end thrust on said rod caused by the action of the criinp lifters 42 when they are forced forward and outward plunger 46, thereby relieving the cam 10 of such end thrust. At its front end, as shown in Figs. 3 and 4, the rod 58 is reduced and provided with ahead 68, which is secured thereon by a flanged nut 69, the hub of the head extending loosely through the central opening in the die29 and the flange of the nut being formed onopposite sides with lugs 70, which bear against the front or outer side of the die 29 on opposite sides of the-opening therein. v i r he plunger 46 is provided at its front end with a rounded hardened steel head 71, which coiiperates with the head 68 and the inclined projections 43 on the dies 42, to force said dies outwardly between the dies 4, and 29 when said plunger is thrust forof the cam rejection 54, the slide '52 and lever 48 screw 50 serves to vary the limit of the for as indicated by a scale on the lever 48, shown he adjusting,

by the in Fig. 2, for the purpose of slightly varythe lower part of the head-23, as shown in Figs. 1, 2, 3 and 7. j

The blanks or pipe sections from which the elbows are made are placed on the horn 1 and fed forward step by step to the corrugating and crimping dies, and theoperation of the machine is controlled by the following mechanism: As shown in Figs. 1, 2, 3 and 4C, a chuck or head 76 mounted on and movable lengthwise of the horn 1 and die 4, has a hardened steel sleeve or bushing 77 with a flaring groove in its front end next to the horn for receiving and holding in place on the horn the rear end of an elbow blank or pipe section. A reciprocating ratchet bar 78, guided parallel with and above the horn 1 in the cross member 2 of the frame, passes loosely through and is guided in an opening in the chuck 76. At its rear end it is provided with a downwardly projecting pin and roller 79 in the groove of cam 7. At its front end it is pro vided with a laterally projecting trip 80. The chuck 76 is provided in the opening between the horn 1 and ratchet bar 78 with pivoted feeding and h'olding pawls 81 and 82, adapted to work respectively with the ratchetb'ar and with the ratchet 3 on the upper side of the horn. A spring 83, pressing upwardly-against the tail of the pawl 82, holds it against the under side of the pawl 81 and tends'to maintain both pawls in working position, as shown in Fig. 3. The pawl 81 has a pin 84 projecting laterally therefrom through. aslot or opening in the head or chuck 76 to theouter side of which is pivoted a catch 85 adapted when it is turned backward to'engage with the pin 84: and to turn and hold both pawls out of working position clear of the ratchet bar 78 and ratchet 3, as shown in Fig. 1.

The head or chuck 76 is formed or provided with a lug or stop 86, which limits the forward movement'of the catch 85,'and a pin 87 held and guided in this stop parallel with the ratchet bar 78, is adapted by engagement with the trip 80, as shown in Figs. 1 and 2, to turn said catch backward at the limit of the advance movement of the chuck. A slide 88', guided in a bearing on the frame member 2 parallel with the ratchet bar 78, has a pin 89 projecting laterally therefrom through a slot in the side of said bearing into engagement with the upper end of a lever 90. The lower end of the lever 90 is connected, as shown in Fig. 1,

by a rod 91 with one arm of a bell crank lever 92, fulcrumed to the frame at the rear end of the machine. The other arm of the lever 92 engages with a vertically movable trip bar 93 guided in the frame and having. as shown in Fig. 11 an incline 93 on its upper end which is normally held by a spring 94 in the path of a shoulder or projection 15 on the clutch pin or dog 15, so as to withdraw and hold said pin or dog out 75 of engagement with the driving wheel 13. As the clutch pin 15, when released by the trip bar 93 and thrust by the spring 16 into engagement with the driving wheel, 13, moves with the clutch member 14 in the direction indicated by an arrow in Fig. 11, the shoulder 15' formed by the transverse notch or channel in the outer side of the pin, engaging with the. incline 93, Withdraws the pin from engagement with the wheel 13, thereby disconnecting the clutch member 14 from said wheel and stopping the machine, the driving wheel 13 being continuously rotated, while the clutch member 14 and shaft 11, with the pin 15, are inter- 90 mittently turned one.revolution at a time.

A trip and stop pin 95 is fitted and adjustable lengthwise in the slide 88 in which it is fastened in adjusted position by a screw 96, threaded in the slide and projecting out wardlytherefrom through the slot in which the pin 89 works. The pin 95 is provided with an index or pointer 97, projecting upwardly therefrom through a slot in the upper side of the slide bearing and working 1 with a scale on said bearing, asshown in Fig. 2. Seats or depressions are formed in the side of the pin 95, as indicated in Fig. 1, for the locking screw 96, at intervals corresponding with the divisions of the scale, to facilitate setting the pin for arresting the backward or return movement of the chuck different lengths and angles. The pin-95 is located in the path of the catch 85, so that i when the chuck 76 is moved backward it will turn the catch forwardagainst the stop 86, turn the upper end of the lever 90 back: ward, and withdraw the trip bar 93 from engagement with the clutch dog 15, thereby starting the machine, besides arresting the backward movement of the chuck in proper position for making elbows of a given length and angle.

An arm 98 pivoted to the lower end of the lever 90 and extending upwardly and forwardly therefrom, has at its front end a handle within easy reach of the'ope'rator, and is formed on the under sidewith a lug 99, adapted to engage with a detent 100 for locking it when it is shifted forward in position to hold the trip bar 93 out of operative position. The arm 98 is also formed or provided on the under side with a projec tion 101, and the chuck .76 is provided with 139 an outwardly projecting arm or roller 102 adapted at the limit of the forward movement of the chuck to engage with the lug or projection 101 and lift the lug 99 out of engagement with the detent 100, thereby releasing the trip bar 93 and stopping the machine.

In Figs. 3, 4, 5 and 6, 103 designates an elbow blank or pipe section.

In the operation of the machine, when the chuck76 is in its front position, as shown in Fig. l, the head 23 standing parallel with the head 18, as shown in Figs. 1 and 3, and the dies 19 and 25 being withdrawn from the dies Land 29, the operator thrusts a blank or straight pipe section into place around the dies 29 and 1 against the chuck sleeve 77, moving the head or chuck 76 backward on the horn 1 till its movement is arrested by the engagement of the catch 85 with the pin 95, and the catch is turned forward against the stop 86 and the pin 95 is thrust backward as far as it will go. As the catch 85 is turned againstthe stop 86 the pawls 81 and 82 are released and thrown bythe spring 83 into engagement with the ratchet bar 78 and ratchet 3, and as the trip and stop pin 95 with. the slide 88 is thrust backward, the lever 90 as shown in Fig. 1, is turned to the right, thereby withdrawing the trip bar 93, releasing the clutch dog 15 and starting the machine. As the pivot arm 98 is thrust forward, the lug 99 is carried into engagement with the detent 100, thereby locking the trip bar 93 out of V operative position.

'ith each revolution of the cam shaft 5, the dies 19 and 25 are thrust inwardly against the pipe, clamping it against the dies 1 and 29, as shown in Fig. 3, by the action of the rings 20 and 26, which are turned to the left or counterclockwise, as seen in Figs. 5 and 6, by the arm 39 on the rocker shaft 31, which is actuated by the cam 9 and lever 34;. The plunger 46 is then thrust forward by the projection 52 on cam 10 acting through the slide 52 on lever 48,

which is connected with the rod 47. As the head 71 is thrust forward with the plunger 16, it acts against the inclined projections 43 on the dies 42 and cooperates with the head 68, which is immovably held in its front position, as shown in Fig. 3, by the stop nuts .67 on the rod 58, to force'said dies forwardly and then outwardly between the dies 2 and 29, thereby producing an outward transverse bulge or crimp in the pipe. The plunger 46 is then withdrawn by the engagement of the projection 55 on cam 10 with roller 56, which thrusts the slide 57 backward, carryingthe rod 47 with it. The dies 42 are thus withdrawn radially inward andlongitudinally backward into the die at, as shown in Fig. 4, by the engagement of the projections 44: on the rear ends against backward movement.

8 operating through the slide 73, connect- I ing rod 71 and yoke 75 on the head 23. By this operation the outward transverse bulge made in the pipe by the dies 42 is closed and folded flat between the beveled ends of the dies 19 and 25, at a downward and rearward inclination to the pipe, as shown in Fig. 1. The dies 19 and 25 are now retracted into the positions in which they are shown in Figs. 5 and 6, and the head 23 and the die 29 are swung forward to their original positions, as shown in Fig. 3, by the operation of the cam 8 on the slide 73, and of the projection 61 of cam 10 on the slide 60. The chuck 76 is now. fed forward with the blank or pipe section an interval by the action of the cam 7 and ratchet bar 78, working with the pawl 81, the pawl 82 engaging the ratchet 3, holding the chuck The dies 19 and 25 are then moved inwardly again, as above explained, and clamp the pipe in its new position on the dies 1 and 29, the dies 25 pressing the previously formed outstanding crimp flat against the. pipe. The dies '12 while the blank or pipe is clamped in its new position, are again moved for-" ward and forced outward between the dies 4 and 29, making another outward bulge in the pipe, the operations as above eX- plained being repeated in the formation of a series of crimps until the chuck 76 arrives at the end of its forward movement. \Vhen this occurs the backward movement of the ratchet bar 78 carrying the trip 80 into engagement with the pin 87, turns the catch 85 backward, thereby disengaging the pawls 81 and 82 from the ratchet bar and from the ratchet 3 on the horn. At the same time the trip roller 102 carried by the chuck 76 engaging with the lug 101, lifts the lug 99 on the handle arm 98 out of engagement with the detent 100, thereby releasing the trip bar 93, which is thrust upwardly by the spring 91 into the path of the projection or shoulder on the clutch dog 15, which is thus retracted, stopping the machine. The last crimp formed on an elbow is pressed down flat against the elbow bycthe second inward movement of the dies 25 by the cam 9- in the last revolution thereof) Another-blank or pipe section being inserted by the operator in the machine, moves the chuck 76 back to its initial position, starting the machine,

and the operations as above explained are automatically repeated in the formation of another elbow.

By setting the trip and stop pin 95 backward or forward in the slide 88, longer or shorter elbows having more or less transverse crimps and hence of less or greater angle, may be made. By adjusting the slide or. fulcrum block 36 of the lever 34 up or down with the screw 37, the inward movement of the dies 19 and 25 is adjusted for operating on sheet metal of difierent thicknesses or properties. By adjusting the block reciprocating ratchet bar adapted to work 49 forward or backward with the screw 50,

the advance movement of the plunger 4:6 and hence the outward movement of the dies 42 are varied'so as to take up more or less metal in the crimps and thus slightly vary the angle of the elbows as may be desired according to the varying nature and condition of the sheet metal.

Various modifications in the details of construction and arrangement of parts of the machine may be made without materially affecting its mode of operation and without departure from the PIIIICIPlG Of the invention as defined in the following claims.

I claim:

1. In an elbow machine the combination with corrugating and crimping dies of. a pipe supporting horn formed with a longitudinal ratchet, a chuck movable lengthwise thereof and provided with pivoted feeding and holding pawls, a reciprocating ratchet bar guided in the chuck parallel with the horn and adapted to work with the feeding pawl, and means for actuating said bar, the holding pawl being adapted to work with the horn ratchet and to be thrown and held outof engagement therewith by the feeding pawl when the latter is turned out of engagement with the ratchet bar. y.

2. In an elbow machine the combination with corrugating and crimping dies, of a pipe supporting horn having a longitudinal ratchet, a chuck movable lengthwise thereof and provided with feeding and holding pawls, a reciprocating ratchet bar adapted to work with the feeding pawl, the holding pawl being adapted to work with the horn ratchet, means for actuating the ratchet bar, a trip on the ratchet bar arranged to throw the pawls out of engagement with the ratchet bar and horn ratchet at the limit of the advance movement of the chuck, and a trip stop adapted to release the pawls at the limit of the return movement of the chuck.

3. In an elbow machine thecombination with corrugating and crimping dies and a shaft for operating said dies having a clutch controlled driving connection,vof a pipe sup porting horn having a longitudinal ratchet, a chuck movable lengthwise of the horn and provided with feeding and holding pawls, a

with the feeding pawl, the holding pawl working with the horn ratchet, and a movable trip stop adapted to release the pawls and to operate the clutch for starting the machine at the limit of the return movement of the chuck.

4. In an elbow machine the combination with corrugating and crimping dies, of a pipe supporting horn having a longitudinal ratchet, a pipe chuck movable lengthwise of the horn and provided with feeding and holding pawls, a reciprocating ratchet bar adapted to work with the feeding pawl, the holding pawl working with, the horn ratchet, a catch on the chuck for'throwing and holding the pawls out of engagement with the ratchet bar and horn ratchet, means for actuating the ratchet bar, and a trip on the ratchet bar cooperating with the catch to throw the pawls out of operative position movable trip stop adapted to release the pawl and to engage the clutch for starting the machine at the end of the return movement of the chuck, and a trip on the chuck adapted to disengage the clutch for stopping the machine at the end of the advance movement of the chuck.

6. In an elbow machine the combination with corrugating and crimping dies and clutch controlled means for operating said dies, of a pipe supporting horn, a pipe chuck movablelengthwisg of the horn and provided with a pawl, a reciprocating ratchet bar adapted to work'with said pawl, means for throwing the pawl out of engagement with the ratchet bar at the end of the advance movement of the chuck, a trip stopv adapted, to release the pawl and to engage the clutch for starting the machine at the end of the return movement of the chuck,

.said stop being adjustabl'elengthwise of the horn to arrest the chuck on its returnmovement in different positions for elbows of different lengths and angles, and a trip carried by the chuck and adapted to disengage the clutch for stopping the machine at the end of the advance movement of the chuck.

7. In an elbow machine the combination with corrugating and crimping dies and clutch controlled means foroperating the dies, of a pipe supporting horn, a pipe chuck movable lengthwise of the horn and provided with a pawl, a reciprocating ratchet bar adapted to work with said pawl, a latch on the chuck for holding the "pawl out of engagement with the ratchet bar during the return movement of the chuck, a trip arranged to cooperate with the catch to throw the pawl out of operative position at the end of the advance movement of the chuck, a slide movable lengthwise of the horn, a connection with said slide for operating the clutch, and a trip stop connected with and adjustable lengthwise of said Slide, and adapted tocooperate with said catch for releasing the pawl and to release the clutch for starting the machine at the end of the return movement of the chuck.

8. In an elbow machine the combination with corrugating and crimping dies and clutch controlled means for operating the dies, of a pipe-supporting horn, a recipr0- cating ratchet bar, a pipe chuck movable lengthwise of the horn and provided with a pawl adapted to work with the ratchet bar, a

catch for throwing and holding the pawl out of engagement with the ratchet bar, a front stop for the catch, a sliding pin movable in said stop parallel with the rack bar, and a trip on the rack bar arranged to cooperate with said pin to shift the catch into operative position at the end of the advance movement of the chuck.

9. In an elbow machine the combination with corrugating and crimping dies, of a pipe supporting horn, a reciprocating ratchet bar parallel with the horn, mechanism for operating the dies and ratchet bar, a clutch controlling the operation of said wise of the horn and rovided with a pawl adapted to work with the ratchet bar, a catch movablymounted on the chuck for throwing and holding the pawl. out of operative position, a front trip stop cooperating with the catch to disengagethe pawl 5 from the ratchet bar at the end of the advance movement of the-chuck, a back trip stopmovably mounted on' the machine and adapted to shift the catch and release the stop the machine at the end of the advance -movement of the chuck.

10. In an elbow machine the combination with corrugating and crimping dies and mechanism for operating the dies, of a pipe supporting horn provided with a longitudinal ratchet, a reciprocating ratchet bar parallel with the horn and having adjacent to its front end a laterally projecting trip,

pin guided in said stop parallel. with the ratchet bar and adapted by engagement with the trip thereon to thrust the catch backward and turn the pawls out of working position at the end of the advance move ment of the chuck, and a back stop adapted by engagement with the catch to shift it forward and release the pawls at the end of the return movement of the chuck.

11. In an elbow machine the combination of a pipe supporting horn, provided at its front end with a stationary. die,'a stationary annular head surrounding said die and provided with radially movable dies, an oscillatory die hinged to the end of the stationary die at one side thereof, an oscillatory annular head hinged to the stationary head in alinement with the hinge of the oscillatory die and provided with radially movable dies, means for swinging the oscillatory die and head toward and from the station ary die and head and means for automatically and simultaneously advancing and withdrawing both sets of radially movable dies toward and from the inner dies. mechanism, a pipe chuck movable length- 12. In an elbow machine the combination 'of a pipe supporting horn provided at its front end with a stationary die, a stationary annular head surrounding said dieand provided with radially movable dies, an os-- cillatory die hinged to the'end of the stationary die at one side thereof and movable toward and from the'same, an oscil-,

latory annular head hinged to the stationary head in alinement with the hinge of the oscillatory die and provided with radially movable dies, means for swinging the oscillatory die and head toward and from the stationary die and head, rings guided in said heads for operating the radially movable dies, and provided with peripheral teeth, a rocker shaft provided with a toothed arm engaging said teeth, and means for rocking said shaft.

13. In an elbow machine the combination of a pipe supporting horn terminating at its front end ina stationary die, a stationary annularhead surrounding said die and provided with radially movable dies, an oscillatory die hinged to the end of the stationary die at one side thereof, an'oscillatory annular head hinged to the stationary head in axial alinement with the hinge of the oscillatory die and provided with radially 'movable dies, meansfor swinging the oscilsaid lever.

' 14. In an elbow machine theeombination of a pipe supporting horn terminating in a hollow stationary die, a stationary annular head surrounding said die and provided with radially movable dies, an internally recessed oscillatory die corresponding in cross section with said stationary dieand hinged thereto at the end and one side thereof, an oscillatory annular head hinged to the stationary head in alinement with, the hinge of the oscillatory die and provided with radially movable dies, means for operating the radially movable dies simulta: neously, a longitudinally movable plunger fitted in the stationary die and having a rounded head at its front end and a groove adjacent thereto, longitudinally and radially movable bulging dies fitted within the stationary die and having V-shaped inner ends and rearwardly extending shanks with inwardly projecting lugs engaging said groove, a rod passing axially through and movablelengthwise in the plunger and connected with the oscillatory die, and a head fixed on said rod inside of the oscillatory die and adapted to cooperate with the head of the plunger by engagement with the V- shaped inner ends of the bulging dies when the plunger is thrust forward to force said dies radially outward between the stationary and oscillatory dies.

15. In an elbow machine the combination of a pipe supporting horn terminating in a hollow stationary die, a stationary annular head surrounding said die and provided with radially movable dies, an internally recessed oscillatory die hinged to the stationary die at the end and one side thereof, an oscillatory annular head hinged to the stationary head in alinement with the hinge of the oscillatory die and provided with radially movable dies, means for operating the radially movable dies simultaneously, a longitudinally movable plunger fitted in the stationary die and having a head at its front end and a groove adjacent thereto, longitudinally and radially movable bulging dies fitted within the stationary die and having V-shaped inner ends, and rearwardly extending shanks terminating with inwardly projecting lugs engaging said groove, a rod passing axially through and movable lengthwise in the plunger and connected with the oscillatory die, a head fixed on said rod inside of the oscillatory die and adapted to cooperate with the head of the plunger by engagement with the V-shapedinner ends of the bulging dies to force said dies radially outward between the stationary and oscillatory dies when bhe plunger is thrust forward, and means for varying the forward movement of the plunger and the outward movement of the bulging dies.

16. In an elbow machine the combination of an inner stationary die, a stationary head provided with dies movable radially toward and from the inner die, an oscillatory head hinged to the stationary head at one side thereof and transversely to its axis and provided with radially movable dies, and an oscillatory die hinged to the stationary die within the oscillatory head by a curved finger attached to one die member and fitting a curved hole in the other die member concentric with the hinge of the oscillatory head.

In witness whereof I hereto aflix my signature in presence of two witnesses;

PHILLIPP F'. F LAGGE.

WVitnesses CHAS. L. Gross, ALICE E. Goss. 

